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Specification forming part of Letters Patent No. @,lr, dated November 4, lSl.

To all whom it may concern:

Beit known that I, Louis S. I-onnins, of the city, county, and State of New York, have invented or produced a new product or manu-V facture which I denominate Iobbins7 Lubricating-Oil;77 and I do hereby declare that the following is a full and exact description of the method or process by which I produce the said oil, reference being had to the accompanying drawings, making a part of this speciiication.

Figure l is a vertical section of a distilling apparatus; Fig. 2, a vertical section ci' a bleaching and purifying kettle, and Fig. 3 a top view of the said kettle.

A is the body of the still, which I shall hereinafter' designate by the word still57 B, a curved pipe connected with the top of the still; O, a movable joint of pipe for connecting the curved still-neck 'B with the still-worm or condenser 135], a stcam-pipe passing through the side of the still, and thence down its inner side and along its bottom to near the center thereof, Where it is curved into a circular or spiral form around the center ofthe still-bot tom, and is perforated With holes for the injection of steam into the-still, to be used as an auxiliary in the process of producing my lubricating-oil'.

.r/ is a steam-pipe passing through a close joint in the side of the still, and terminating` in a spherical perforated head or coil, 7L, in the upper portion ofthe still.

A thermometer must be combined with the still in such a manner as to indicate the temperature of the interior thereof. I make use of Fahrenheits thermometer, and consequently all allusions to temperature in this specilication have reference to that instrument.

I( is the bleaching and purifying kettle. Z is a steam-pipe combined therewith in such a manner as to enable the temperature oi' the oil to be raised when placed in the said kettle;

.and m is a steam-pipe terminating in a per- Aforated head or coil near the center ofthe bot'- tom of the kettle, through which steam is injected into the oil, for the purpose hereinafterl set forth.

rIhe following is a description of the process by which I produce my nenr lubricating-oil, to wit: Place in the still a quantity of oil which has been distilled from resin at a range of temperature of about 5500, as described in the patent issued to me and bearing the same date With the present patent, Introduce also into the said still, either before or after or l with the oil, a quantity of slaked lime equal to about live per cent. of the oil placed therein, and then close the man-hole plate and lute it in the usual manner. Vhen thus prepared, make a nre under the still and so regulate it as to gradually raise the temperature of the interior thereof` to about 550, and retain it as near to that range of temperature as possible until the process is completed. W'hen the temperature of the interior of the still reaches to about 30()O of heat, inject steam into the oil contained therein through the pipe f, and when its temperature reaches 5500 inject steam into the still through the pipe g. Oil will commence passing off from the still in the form of vapor as soon as the interior temperature thereof reaches 550 ot' heat, and about this range of temperature must be maintained Within the still until all the oil contained therein has been volatilized. The volatilized oil, mixed with the steam injected into the top and bottom of the still, will pass into and be condensed in the worm D, and thence flow into a suitable receiving-vessel. The steam injected into the bottom ofthe still aids in volatilizing the oil, and the steam inj ected into the top of the still serves the purpose of purifying and partially bleaehingthe oil when in a volatilized state. The oil produced by the aforesaid process of distillation must be again distilled in precisely the same manner as that before described, save that, in place of the sla-lied lime employed in that process, a similar proportional quantity of caustic lime must be placed in the still with the oil. The oil produced by this last process of distillation must now be placed in the open purifying-kettle K, and, afterraising its temperature to about the range of 225O by means of the steam-pipe Z, steam must be injected into the oil through the steam-pipe m until the oil is lined, and until the acid and coloring-matter produced therein by the action of the atmosphere are expelled therefrom, when it l will be quite limpid and ready for use for lubricating purposes.

What I claim as my invention, and desire to secure by Letters Patent, is

l. rlhe new and original product or manufacture which I denominate Robbins lubrii eating-oil,77 the process of producing which I have herein fully set forth.

2. Every use and application of the said oil. Vitnesses: LOUIS S. ROBBINS.

Z. C. Itoninms, .L Inoivn. 

